These are not the same size of amplifier: Rotel RA-1592 MKII has roughly 2.7x the power of Hegel H150. That is about 4.3dB, so it is a question of room size and how hard your speakers are to drive, not of one being the better amplifier.
| Area | Better | Why |
|---|
| Power | B | Rotel RA-1592 MKII has more power - 200W against 75W into 8 ohms. That is about 4.3dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Hegel H150 the better fit for desk or near-field listening, a small room and a mid-size room, and Rotel RA-1592 MKII for a large room and a very large room. Match the amplifier to the room you actually have, not the one you want. |
| Speaker load rating | A | Hegel H150 is rated down to 2 ohms against 4, so it is the safer partner for a low-impedance speaker. |
| Noise floor | B | Rotel RA-1592 MKII is the quieter design on paper - 103dB against 100dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board. Rotel RA-1592 MKII goes higher - 384kHz against 192kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | evenly matched | Only Hegel H150 has Chromecast. Neither list is longer in a way that matters - check the one service you actually pay for. |
| Analogue inputs | B | Rotel RA-1592 MKII takes more analogue sources - 4 against 3. |
| Room to grow | evenly matched | The same expansion options on both. |
| Headphones | depends | Only Rotel RA-1592 MKII has a headphone output. Worth something if you listen late, nothing if you never do. |
| Shelf space | depends | Hegel H150 takes up about 20% less shelf area (1505cm² against 1888cm²), and it is 85mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | B | Rotel RA-1592 MKII costs less - $3,200 against $3,600 at list. |
| Watts per dollar | B | Rotel RA-1592 MKII is the cheaper watt - about $16 per watt against $48. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Hegel H150 B Rotel RA-1592 MKII
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both amplifiers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Rotel RA-1592 MKII is the easier recommendation: it leads on most of the measured areas and costs less. Take Hegel H150 if one of the "depends" rows above describes your system. Start with the room. In a large or open-plan room, or with speakers that are hard to drive - low sensitivity, or an impedance that dips - Rotel RA-1592 MKII has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 75 watts is already more than most people ever use, and the extra 125 watts would be headroom you pay for and never hear - we rate Rotel RA-1592 MKII poorly for near-field use for exactly that reason.
What a spec sheet cannot show: how either sounds with your speakers, how the controls feel day to day, and what the app is like to live with - which is where most all-in-one amplifiers are actually won or lost. Power figures are the manufacturers' own and are not measured to a common standard, so treat small differences as noise. If you can hear both, that will tell you more than any row above.